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0 pointsjamescostian9y ago0 comments

I apologize for writing "cellphone" instead of specifically "smartphone" in my comment - I meant to say the latter.

Nevertheless, what you describe sounds a lot like a "smartphone with location services off" (assuming you trust the smartphone)

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jacquesm9y ago

Accelerometer can do some pretty impressive dead reckoning once you have a fix. Microphones can be used for triangulation based on multiple fixes on the same sound sources (used for shot detection, but it works the other way around too).

http://www.popsci.com/technology/article/2013-04/smartphone-...

Smartphones can track you in a large number of ways, and you really should not trust them (esp. not if they are Android).

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